Macropsis fuscinervis (Boheman, 1845)

Tishechkin, D. Yu., 2019, Leafhoppers of the genus Macropsis Lewis, 1836 (Homoptera: Auchenorrhyncha: Cicadellidae: Macropsinae) on Sakhalin - different evolutionary trends in different species, Russian Entomological Journal 28 (2), pp. 107-119 : 109

1. Macropsis fuscinervis (Boheman, 1845)

Figs 1–6, 54–65, 128–131.

COLORATION. The material on this species from Sakhalin is small, and it does not allow adequately assess the colour variability. All studied specimens have pale yellowish coloration with dark pattern (Figs 1–2) and belong to most common colour variation prevailing in all mainland populations (Figs 3–4). Light grey or yellowish females sometimes found in the mainland (Figs 5–6), were not found on Sakhalin.

MALE ABDOMINAL APODEMES AND PENIS. Abdominal apodemes of 2 nd tergite in male narrow, usually slightly bent inwards, separated by broad rounded notch (Figs 54–55). Sternal apodemes more or less triangular, strongly convergent, sometimes with expanded tips (Figs 56– 57). Penis rather broad in side view (Figs 58–59). We failed to find significant differences in the shape of apodemes and penis between the mainland (Figs 54–59) and insular (Figs 60–65) populations.

HOST PLANTS. Populus tremula L. across all the range from the Far East to Western Europe.

MALE CALLING SIGNAL. In all poplar-feeding Macropsis species no clear-cut distinction exists between calling and courtship signals. Normally, single male produces simple signal (calling signal in the strict sense). Sometimes it spontaneously produces a more complex signal, the same as when courting a female.

In males from Sakhalin only short signals were recorded. Signal of this type is a single phrase usually lasting from 5–7 up to 15–20 s ( Figs 128–129 ). It begins with a succession of rather long pulses of the same amplitude following each other with a period of about 200–600 ms. Then follows a long succession of shorter pulses. It begins quietly and reaches maximum intensity at about one-third of its duration; pulse repetition period in it increases from 40–50 up to 100–200 ms. Signal temporal patterns in males from Sakhalin ( Figs 128–129 ) and the mainland ( Figs 130–131 ) are almost identical .

RANGE. Transpalaearctic.

REMARKS. No significant differences in any trait between the mainland and insular populations were found.

Figures

Figs 128–141. Oscillograms of male calling signals: 128–131 — Macropsis fuscinervis; 132–141 — M. suspecta; 128–135 — simple signal; 136–141 — complex signal; 128–129, 132–133, and 136–138 — males from Sakhalin; 130–131, 134–135, and 139–141 — males from the mainland. Faster oscillograms of the parts of signals indicated as “129”, “131”, “133”, “135”, “137–138”, and “140–141” are given under the same numbers. Рис. 128–141. Осциллограммы приЗывных сигналов: 128–131 — Macropsis fuscinervis; 132–141 — M. suspecta; 128–135 — простой сигнал; 136–141 — сложный сигнал; 128–129, 132–133 и 136–138 — самцы с Сахалина; 130–131, 134–135 и 139–141 — самцы с материка. Фрагменты сигналов, обоЗначенные цифрами “129”, “131”, “133”, “135”, “137–138” и “140–141”, представлены на осциллограммах под такими же номерами.